[PATCH] ASoC: amd: ps: Fix uninitialized ret in create_acp64_platform_devs()

[PATCH] ASoC: amd: ps: Fix uninitialized ret in create_acp64_platform_devs()

[Nathan Chancellor]

Clang warns:

  sound/soc/amd/ps/pci-ps.c:218:2: error: variable 'ret' is used uninitialized whenever switch default is taken [-Werror,-Wsometimes-uninitialized]
          default:
          ^~~~~~~
  sound/soc/amd/ps/pci-ps.c:239:9: note: uninitialized use occurs here
          return ret;
                 ^~~
  sound/soc/amd/ps/pci-ps.c:190:9: note: initialize the variable 'ret' to silence this warning
          int ret;
                 ^
                  = 0
  1 error generated.

Return -ENODEV, which matches the debug message's description of this block.

Fixes: 1d325cdaf7a2 ("ASoC: amd: ps: refactor platform device creation logic")
Link: https://github.com/ClangBuiltLinux/linux/issues/1779
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
 sound/soc/amd/ps/pci-ps.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c
index 401cfd0036be..f54b9fd9c3ce 100644
--- a/sound/soc/amd/ps/pci-ps.c
+++ b/sound/soc/amd/ps/pci-ps.c
@@ -217,6 +217,7 @@ static int create_acp63_platform_devs(struct pci_dev *pci, struct acp63_dev_data
 		break;
 	default:
 		dev_dbg(&pci->dev, "No PDM devices found\n");
+		ret = -ENODEV;
 		goto de_init;
 	}
 

---
base-commit: 03178b4f7e2c59ead102e5ab5acb82ce1eaefe46
change-id: 20230105-wsometimes-uninitialized-pci-ps-c-3b5725c6ed31

Best regards,
-- 
Nathan Chancellor <nathan@kernel.org>

Re: [PATCH] ASoC: amd: ps: Fix uninitialized ret in create_acp64_platform_devs()

[Mukunda,Vijendar]

On 05/01/23 21:23, Nathan Chancellor wrote:
> Clang warns:
>
>   sound/soc/amd/ps/pci-ps.c:218:2: error: variable 'ret' is used uninitialized whenever switch default is taken [-Werror,-Wsometimes-uninitialized]
>           default:
>           ^~~~~~~
>   sound/soc/amd/ps/pci-ps.c:239:9: note: uninitialized use occurs here
>           return ret;
>                  ^~~
>   sound/soc/amd/ps/pci-ps.c:190:9: note: initialize the variable 'ret' to silence this warning
>           int ret;
>                  ^
>                   = 0
>   1 error generated.
>
> Return -ENODEV, which matches the debug message's description of this block.
>
> Fixes: 1d325cdaf7a2 ("ASoC: amd: ps: refactor platform device creation logic")
> Link: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FClangBuiltLinux%2Flinux%2Fissues%2F1779&data=05%7C01%7CVijendar.Mukunda%40amd.com%7Cad26656c3d2f4c75d00208daef350528%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C638085308267581104%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=eeHVStOIOcy%2FdDISOKlGNeyEwx4i5AtJZmQ5dcNB7XQ%3D&reserved=0
> Signed-off-by: Nathan Chancellor <nathan@kernel.org>
> ---
>  sound/soc/amd/ps/pci-ps.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c
> index 401cfd0036be..f54b9fd9c3ce 100644
> --- a/sound/soc/amd/ps/pci-ps.c
> +++ b/sound/soc/amd/ps/pci-ps.c
> @@ -217,6 +217,7 @@ static int create_acp63_platform_devs(struct pci_dev *pci, struct acp63_dev_data
>  		break;
>  	default:
>  		dev_dbg(&pci->dev, "No PDM devices found\n");
> +		ret = -ENODEV;
ACP PCI driver supports different configurations. As per design , even  when no child dev
nodes are created , ACP driver probe should be successful. ACP PCI driver probe failure
causes power state transition failures when no child device nodes are created.
We should not return -ENODEV in this case.
return 0 is enough in this case. No need to de-init the ACP.


>  		goto de_init;
>  	}
>  
>
> ---
> base-commit: 03178b4f7e2c59ead102e5ab5acb82ce1eaefe46
> change-id: 20230105-wsometimes-uninitialized-pci-ps-c-3b5725c6ed31
>
> Best regards,

Re: [PATCH] ASoC: amd: ps: Fix uninitialized ret in create_acp64_platform_devs()m

[Nathan Chancellor]

On Thu, Jan 05, 2023 at 10:34:10PM +0530, Mukunda,Vijendar wrote:
> On 05/01/23 21:23, Nathan Chancellor wrote:
> > Clang warns:
> >
> >   sound/soc/amd/ps/pci-ps.c:218:2: error: variable 'ret' is used uninitialized whenever switch default is taken [-Werror,-Wsometimes-uninitialized]
> >           default:
> >           ^~~~~~~
> >   sound/soc/amd/ps/pci-ps.c:239:9: note: uninitialized use occurs here
> >           return ret;
> >                  ^~~
> >   sound/soc/amd/ps/pci-ps.c:190:9: note: initialize the variable 'ret' to silence this warning
> >           int ret;
> >                  ^
> >                   = 0
> >   1 error generated.
> >
> > Return -ENODEV, which matches the debug message's description of this block.
> >
> > Fixes: 1d325cdaf7a2 ("ASoC: amd: ps: refactor platform device creation logic")
> > Link: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FClangBuiltLinux%2Flinux%2Fissues%2F1779&data=05%7C01%7CVijendar.Mukunda%40amd.com%7Cad26656c3d2f4c75d00208daef350528%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C638085308267581104%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=eeHVStOIOcy%2FdDISOKlGNeyEwx4i5AtJZmQ5dcNB7XQ%3D&reserved=0
> > Signed-off-by: Nathan Chancellor <nathan@kernel.org>
> > ---
> >  sound/soc/amd/ps/pci-ps.c | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c
> > index 401cfd0036be..f54b9fd9c3ce 100644
> > --- a/sound/soc/amd/ps/pci-ps.c
> > +++ b/sound/soc/amd/ps/pci-ps.c
> > @@ -217,6 +217,7 @@ static int create_acp63_platform_devs(struct pci_dev *pci, struct acp63_dev_data
> >  		break;
> >  	default:
> >  		dev_dbg(&pci->dev, "No PDM devices found\n");
> > +		ret = -ENODEV;
> ACP PCI driver supports different configurations. As per design , even  when no child dev
> nodes are created , ACP driver probe should be successful. ACP PCI driver probe failure
> causes power state transition failures when no child device nodes are created.
> We should not return -ENODEV in this case.
> return 0 is enough in this case. No need to de-init the ACP.

Thank you for the review and input and sorry for getting it wrong! I
will send a v2 replacing 'break;' with 'return 0;' shortly.

> >  		goto de_init;
> >  	}
> >  
> >
> > ---
> > base-commit: 03178b4f7e2c59ead102e5ab5acb82ce1eaefe46
> > change-id: 20230105-wsometimes-uninitialized-pci-ps-c-3b5725c6ed31
> >
> > Best regards,
> 

Re: [PATCH] ASoC: amd: ps: Fix uninitialized ret in create_acp64_platform_devs()

[Nathan Chancellor]

On Thu, Jan 05, 2023 at 10:11:09AM -0700, Nathan Chancellor wrote:
> On Thu, Jan 05, 2023 at 10:34:10PM +0530, Mukunda,Vijendar wrote:
> > On 05/01/23 21:23, Nathan Chancellor wrote:
> > > Clang warns:
> > >
> > >   sound/soc/amd/ps/pci-ps.c:218:2: error: variable 'ret' is used uninitialized whenever switch default is taken [-Werror,-Wsometimes-uninitialized]
> > >           default:
> > >           ^~~~~~~
> > >   sound/soc/amd/ps/pci-ps.c:239:9: note: uninitialized use occurs here
> > >           return ret;
> > >                  ^~~
> > >   sound/soc/amd/ps/pci-ps.c:190:9: note: initialize the variable 'ret' to silence this warning
> > >           int ret;
> > >                  ^
> > >                   = 0
> > >   1 error generated.
> > >
> > > Return -ENODEV, which matches the debug message's description of this block.
> > >
> > > Fixes: 1d325cdaf7a2 ("ASoC: amd: ps: refactor platform device creation logic")
> > > Link: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FClangBuiltLinux%2Flinux%2Fissues%2F1779&data=05%7C01%7CVijendar.Mukunda%40amd.com%7Cad26656c3d2f4c75d00208daef350528%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C638085308267581104%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=eeHVStOIOcy%2FdDISOKlGNeyEwx4i5AtJZmQ5dcNB7XQ%3D&reserved=0
> > > Signed-off-by: Nathan Chancellor <nathan@kernel.org>
> > > ---
> > >  sound/soc/amd/ps/pci-ps.c | 1 +
> > >  1 file changed, 1 insertion(+)
> > >
> > > diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c
> > > index 401cfd0036be..f54b9fd9c3ce 100644
> > > --- a/sound/soc/amd/ps/pci-ps.c
> > > +++ b/sound/soc/amd/ps/pci-ps.c
> > > @@ -217,6 +217,7 @@ static int create_acp63_platform_devs(struct pci_dev *pci, struct acp63_dev_data
> > >  		break;
> > >  	default:
> > >  		dev_dbg(&pci->dev, "No PDM devices found\n");
> > > +		ret = -ENODEV;
> > ACP PCI driver supports different configurations. As per design , even  when no child dev
> > nodes are created , ACP driver probe should be successful. ACP PCI driver probe failure
> > causes power state transition failures when no child device nodes are created.
> > We should not return -ENODEV in this case.
> > return 0 is enough in this case. No need to de-init the ACP.
> 
> Thank you for the review and input and sorry for getting it wrong! I
> will send a v2 replacing 'break;' with 'return 0;' shortly.

Actually, I re-read your message and looked at the code now that I am
back in front of my keyboard and I am a little confused by your message.
Should 'goto de_init' be replaced with 'return 0' to avoid the call to
acp63_deinit() or should ret just be initialized to 0 in this block so
that the call to acp63_deinit() still happens?

Thanks again for your input!
Nathan

> > >  		goto de_init;
> > >  	}
> > >  
> > >
> > > ---
> > > base-commit: 03178b4f7e2c59ead102e5ab5acb82ce1eaefe46
> > > change-id: 20230105-wsometimes-uninitialized-pci-ps-c-3b5725c6ed31
> > >
> > > Best regards,
> > 
> 

Re: [PATCH] ASoC: amd: ps: Fix uninitialized ret in create_acp64_platform_devs()

[Mukunda,Vijendar]

On 05/01/23 23:04, Nathan Chancellor wrote:
> On Thu, Jan 05, 2023 at 10:11:09AM -0700, Nathan Chancellor wrote:
>> On Thu, Jan 05, 2023 at 10:34:10PM +0530, Mukunda,Vijendar wrote:
>>> On 05/01/23 21:23, Nathan Chancellor wrote:
>>>> Clang warns:
>>>>
>>>>   sound/soc/amd/ps/pci-ps.c:218:2: error: variable 'ret' is used uninitialized whenever switch default is taken [-Werror,-Wsometimes-uninitialized]
>>>>           default:
>>>>           ^~~~~~~
>>>>   sound/soc/amd/ps/pci-ps.c:239:9: note: uninitialized use occurs here
>>>>           return ret;
>>>>                  ^~~
>>>>   sound/soc/amd/ps/pci-ps.c:190:9: note: initialize the variable 'ret' to silence this warning
>>>>           int ret;
>>>>                  ^
>>>>                   = 0
>>>>   1 error generated.
>>>>
>>>> Return -ENODEV, which matches the debug message's description of this block.
>>>>
>>>> Fixes: 1d325cdaf7a2 ("ASoC: amd: ps: refactor platform device creation logic")
>>>> Link: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FClangBuiltLinux%2Flinux%2Fissues%2F1779&data=05%7C01%7Cvijendar.mukunda%40amd.com%7Ce9133748553c4463824d08daef4317c1%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C638085368693977265%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=nDmZXCJR%2Fwt%2FautwTwcZostLvRtUrEbYV2l7M2W%2FTD0%3D&reserved=0
>>>> Signed-off-by: Nathan Chancellor <nathan@kernel.org>
>>>> ---
>>>>  sound/soc/amd/ps/pci-ps.c | 1 +
>>>>  1 file changed, 1 insertion(+)
>>>>
>>>> diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c
>>>> index 401cfd0036be..f54b9fd9c3ce 100644
>>>> --- a/sound/soc/amd/ps/pci-ps.c
>>>> +++ b/sound/soc/amd/ps/pci-ps.c
>>>> @@ -217,6 +217,7 @@ static int create_acp63_platform_devs(struct pci_dev *pci, struct acp63_dev_data
>>>>  		break;
>>>>  	default:
>>>>  		dev_dbg(&pci->dev, "No PDM devices found\n");
>>>> +		ret = -ENODEV;
>>> ACP PCI driver supports different configurations. As per design , even  when no child dev
>>> nodes are created , ACP driver probe should be successful. ACP PCI driver probe failure
>>> causes power state transition failures when no child device nodes are created.
>>> We should not return -ENODEV in this case.
>>> return 0 is enough in this case. No need to de-init the ACP.
>> Thank you for the review and input and sorry for getting it wrong! I
>> will send a v2 replacing 'break;' with 'return 0;' shortly.
> Actually, I re-read your message and looked at the code now that I am
> back in front of my keyboard and I am a little confused by your message.
> Should 'goto de_init' be replaced with 'return 0' to avoid the call to
> acp63_deinit() or should ret just be initialized to 0 in this block so
> that the call to acp63_deinit() still happens?
>
> Thanks again for your input!
> Nathan
'goto de-init' should be replaced with 'return 0' for default case.

-
Vijendar
>
>>>>  		goto de_init;
>>>>  	}
>>>>  
>>>>
>>>> ---
>>>> base-commit: 03178b4f7e2c59ead102e5ab5acb82ce1eaefe46
>>>> change-id: 20230105-wsometimes-uninitialized-pci-ps-c-3b5725c6ed31
>>>>
>>>> Best regards,

Re: [PATCH] ASoC: amd: ps: Fix uninitialized ret in create_acp64_platform_devs()

[Mark Brown]

On Thu, 05 Jan 2023 08:53:32 -0700, Nathan Chancellor wrote:
> Clang warns:
> 
>   sound/soc/amd/ps/pci-ps.c:218:2: error: variable 'ret' is used uninitialized whenever switch default is taken [-Werror,-Wsometimes-uninitialized]
>           default:
>           ^~~~~~~
>   sound/soc/amd/ps/pci-ps.c:239:9: note: uninitialized use occurs here
>           return ret;
>                  ^~~
>   sound/soc/amd/ps/pci-ps.c:190:9: note: initialize the variable 'ret' to silence this warning
>           int ret;
>                  ^
>                   = 0
>   1 error generated.
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: amd: ps: Fix uninitialized ret in create_acp64_platform_devs()
      commit: de1cae22898cf10aacc735a21d799b5bbce4496c

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark